12-letter words containing a, b, o, r
- honorability — (American spelling) Alternative form of honourability.
- hop hornbeam — any of several Eurasian and North American trees of the genus Ostrya, of the birch family, especially O. virginiana, bearing hoplike fruiting clusters.
- hopper barge — a barge for disposing of garbage, dredged material, etc., having hoppers in the bottom through which such cargo can be dumped.
- horn balance — an extension of an aircraft control surface that projects in front of the hinge providing aerodynamic assistance in moving the control
- horsebreaker — One who trains, or breaks in, horses.
- housebreaker — a person who breaks into and enters a house with a felonious intent.
- hydrobromate — (chemistry) hydrobromide.
- hydrocarbons — any of a class of compounds containing only hydrogen and carbon, as an alkane, methane, CH 4 , an alkene, ethylene, C 2 H 4 , an alkyne, acetylene, C 2 H 2 , or an aromatic compound, benzene, C 6 H 6 .
- hydrolysable — Alternative spelling of hydrolyzable.
- hydrolyzable — Able to be hydrolyzed.
- hyperbolical — having the nature of hyperbole; exaggerated.
- iambographer — a person who writes iambs
- ibota privet — a Japanese spreading shrub, Ligustrum obtusifolium, of the olive family, having hairy leaves and nodding white flower clusters.
- impardonable — (obsolete) unpardonable.
- imperforable — not able to be perforated
- imponderable — not ponderable; that cannot be precisely determined, measured, or evaluated.
- imprisonable — capable of being imprisoned or incarcerated
- incomparable — beyond comparison; matchless or unequaled: incomparable beauty.
- incomparably — beyond comparison; matchless or unequaled: incomparable beauty.
- incorporable — able to be incorporated.
- indian cobra — a highly venomous cobra, Naja naja, common in India, having markings resembling a pair of spectacles on the back of the hood.
- informidable — (obsolete) Not formidable; not to be feared or dreaded.
- infraorbital — (anatomy) Below the orbit (of the eye).
- inobservable — Unobservable.
- inobservance — lack of attention; inattention; heedlessness: drowsy inobservance.
- insalubrious — unfavorable to health; unwholesome.
- interlobular — (anatomy) Between lobules.
- interorbital — Between orbitals.
- interpolable — able to be interpolated, or suited to interpolation
- interrobangs — Plural form of interrobang.
- interrogable — capable of being interrogated
- irreformable — insusceptible to reforming influences; incorrigible.
- irreformably — in an irreformable manner
- irreprovable — Not reprovable; irreproachable.
- irreprovably — in an irreprovable manner
- irresolvable — not resolvable; incapable of being resolved, analyzable, or solvable.
- irresolvably — In an irresolvable manner.
- isobilateral — (esp of a leaf) capable of being divided into symmetrical halves along two different planes
- job creation — the process by which the number of jobs in an area, organization, etc is increased
- job rotation — the practice of transferring an employee from one work station or activity to another during the working day in order to add variety to a job: often used in assembly line work
- jodrell bank — site of a radio astronomy observatory (Nuffield Radio Astronomy Laboratories) in NE Cheshire, England, that operates a 250-foot (76-meter) radio telescope.
- johannesburg — a city in S Transvaal, in the NE Republic of South Africa.
- johor baharu — a city in S Malaysia, near Singapore.
- johore bahru — a city in and the capital of Johore state, Malaysia, in the S part.
- joseph brant — Joseph (Thayendanegea) 1742–1807, Mohawk Indian chief who fought on the side of the British in the American Revolution.
- k/t boundary — Cretaceous/Tertiary boundary: the time zone comprising the end of the Cretaceous and the beginning of the Tertiary periods
- keyboardists — Plural form of keyboardist.
- kiteboarding — A sport in which participants ride a form of wakeboard or surfboard harnessed to a large kite which is controlled by the rider.
- labia majora — female genitals: outer folds of skin
- labia minora — female genitals: inner folds of skin